Pipetting device
Abstract
Abstract PIPETTING DEVICE, IN WHICH A DISPOSABLE PLASTIC TUBE SUPPLIED FROM A STORE ROLL IS USED AS A PIPETTE. A PROTION OF THE PLASTIC TUBE EXTENDS THROUGH AN ELONGATE, CYLINDRICAL CHAMBER HAVING A TUBE-SHAPED ELASTIC WALL SURROUNDING THE PLASTIC TUBE. THIS CHAMBER IS FILLED WITH LIQUID AND COMMUNICATES WITH A COMPRESSIBLE BELLOW ALSO FILLED WITH LIQUID. BY COMPRESSION OF THE BELLOW IT IS POSSIBLE TO COMPRESS THE PORTION OF THE PLASTIC TUBE SURROUNDED BY THE LIQUID-FILLED CHAMBER AND THUS TO VARY THE INTERNAL VOLUME OF SAID PORTION OF THE PLASTIC TUBE. THIS VARIATION OF THE INTERNAL VOLUME OF THE PLASTIC TUBE IS USED FOR SUCKING UP A PREDETERMINED LIQUID VOLUME TO BE PIPETTED INTO THE PLASTIC TUBE AND SUBSEQUENTLY DISCHARGING THIS PIPETTED LIQUID VOLUME FROM THE PLASTIC TUBE INTO ANOTHER VESSEL. AFTER EACH PIPETTING OPERATION THE USED SECTION OF THE PLASTIC TUBE CAN BE CUT OFF AND A NEW UNUSED SECTION OF PLASTIC TUBE BE SUPPLIED FROM THE STORE ROLL.
Inventors
- 👤 G S Begg
- 👤 N B Jacobson
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |